MLA

Simpson, Randolph Linsly, 1927-1992. Caldisi, Blanford & Co., Photographers, 13 Pall Mall East, London, at P.& D. Colnaghi, Scott & Co. Full length portrait of Dionysus (Dion) Boucicault; man, formally dressed, top hat in hand, leaning on chair. Carte de visite. Box 11, folder 410. circa 1870. https://collections.library.yale.edu/catalog/2003993.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 11, folder 410"])(circa 1870)[Caldisi, Blanford & Co., Photographers, 13 Pall Mall East, London, at P.& D. Colnaghi, Scott & Co. Full length portrait of Dionysus (Dion) Boucicault; man, formally dressed, top hat in hand, leaning on chair. Carte de visite]. https://collections.library.yale.edu/catalog/2003993.